Ammonia compressor



Nov. 29, 1927. 1,651,235

E. B. TERRILL AMMONIA COMPRESSOR Filed March 16 1925 76 I gvwentoz attozneiq UNITED STATES Patented Nov. 29, 1927.

EARL TEBBILL, F COLCHESTER, ILLINOIS.

AMMONIA COMPRESSOR.

i H-Applicationfiled larch 16, 1925. Serial No. 15,877.

This invention relates to ammonia compressors, and particularly tothe valve construction therefor, in which all intake valves are eliminated and the exhaust valves sim- I plified as to. the number of elements, accessibility for repair replacement ,or regrinding.

sion of a construction in which theclearance between the piston and the cylinder .v

head, when the piston is at its extreme limit npw mo em nt, i educed t a mi mum. While the machine as shown by the p e ent- \draw ng i o th v ng e cy in er y e i s unde st od ha numb o i'lind r m y b empl y d a made f ny suitable size.

Referr ng 0 th ng f r ng: a part f ing that the primary valves are brought into operation under normal. operating condiot this specification, I,

F gur s a ert cal c o -s t nth gh the compressor,

Figure Q is a top plan view of the valve retaining and guiding, and'spring housing block, i I Figure 3 is a section taken on the line 3 -3 of Figure '2,

Figure 4 is atop retaining plate,v

Figure 5 is a section taken von the line 5-5 of Figure 4, I

Figure 6 is a top plan view of the valve ,p' 1

' Figure 7 is a's'ection taken on the line 7 -7 of Figure 6. I Figure 8 is a top plan view of the asse1nblei valve'remov'ed from the compressor, an

plan view of the spring 9-9 of Fig. 8;.

accompanying drawlngs by numerals of reference, and especially to Figure 1, wherein is shown the upper portion of the com-' p-ressor. 1 designating the cylinder having a water jacket 2. e i I The piston 3 has the usual upper and lowerseries of packing rings 4 and 5. The cylinder -'is also provided with a removable head 5, secured by a suitable number of V 5a. bolts 6, and further provided with a gas ex- Ina i o o hese eatu e is he p Figure 9 is a section taken on the line' Referring now more particularly to the of admitting the ammonia or other compressible fluid.

The constructlon as above described 1s more or less conventional 1n design, except fonthosegdifierences which are necessary to adapt the machine to my particular valve arrangement. y a

The feature upon which the present invention isbased, is the particular construe-f tion and arrangement ofthe valve or valves which control-the exhaust gases compressed in the compression space of the cylindeixthe details of which aremore clearly illustrated in the several Figures 2 to 9 inclusive, while the general assembly is shown in Figure 1.

Specifically', the valve structure includes primary or main valves and a secondary or relief valve,,the principle of operation betions, while the secondary or relief valve comes into operation under abnormal conditions or pressures within the compresson The upperportion of the inner wall of the cylinder 1 isformed with an annular'flange 10, having a plane ground upper face pro "viding a seat for a disk-like valve plate 11, shown in detail in Figures 7 and 9, said valve plate being provided with an annular series of lugs 12, for the purpose of properly centering it with relation to the removable head 5, and at the same time providing alternaterecessed portions 14 to permit of the passage of the compressed fluids when said plate is caused to rise from its seat formed by'the upper face "of the annular flange 10.

Under normal operating conditions. this valve plate is held to its seat by a heavy coil sprin'g;15, confined'between the upper face'of the valve plate 11 and the lower inner 'face of'the head 5 This plate,-which has a plane ground upper face, is provided with an annu-l'ar'seriesof groups ot'exhaust openings 16, arranged around a central boltreceiv ng opening 17, in which is mounted, and-through which passes a bolt 18, on the upper threaded end of which is secured a valve spring confining disk plate 19, shown in detail in Figures 4 and 5, the lower face of which is provided with a central hub receiving recess 20, and an annular series of spring'centering bosses 21, the purpose of which will be later set forth;

Mounted upon the valve plate 11, and con- *nuiar series tin the present arrangemefi a"spring *retainingdisk seenrsd'up'en the W centric therewith, is a valve spring and which isbored to receive the retaining bolt 18, while the upper portion is formed as a circular boss or extension 24, adapted to seat within the hub receiving recess 20 of the disk plate 19. A nut 25 on the upper end of the bolt 12,,binds the plates 19 and 11, and guide block 22 in assembled relation.

The guide block 22 is provided with an anfour being shown) of vertically disposed, transverse circularspring housing and guiding recesses 26, which preferably open at the periphery of said block as at 27, said block confining and housing the group of coil compression springs 28 of the proper strength to hold to their seats, a series of exhaust valve disks 29, each of which cooperates with one group of exhaust openings in the plate 11, and being of an area sufficient to entirely cover the group with which it cooperates, and each disk valve being guided in its reciprocatory'movements by. the wall of the circular recess in which it is disposed.

Each of the disk valves 29 is provided with a central circular boss 30 upon its upper face, which, with the cooperating upperboss 21 on the lower face of the upper disk plate 19, properly centers the respective valve seat ing spring 28.

Operation.

Assuming, with reference to Figure '1, that the piston 3 has descended, having produced a vacuum or sub-atmospheric pressure in the compression space above the piston, gas inlet port 8 is uncovered, permitting an inflow of gas into said space-9.- The piston on its return or upward stroke, will initially seal the port 8, and the gases trapped within the space 9 will becompressed until the pressure overcomes that of the springs 28:

of the exhaust valves 29, which latter will rise from their seats on the valve plate 11, permitting the gases to escape through the openings 16, and through the exhaust port 7. When the piston has reached its limit of upward travel, the valves 29 will close-under the influence of their respective springs,

the piston returning on its downward stroke to its position shown in Figure 1,; uncover-- ing the gas inlet port 8 for another charge I of gas, and the cycle of operation is'repeated.

Having described my invention, what I ter Patent is: i

1. A compound compressor valve of the class set forth, comprising a valve plate having a ground upper valve seating face, and provided with a series of groups of openings concentric with the axis thereof, a block mounted on said valve plate, and providedwith an annular series of openings,

upper portion of said block and'provided with an annular series of spring centering bosses, compression springs within the openings in said block, anda series of valve disks valve disk guide "block 22, the hub "23' of 'clainr-as new'anddesire to protect-by Let within said openings in, said block, each of said valve disks cooperating with a group of the annular series of openings in the valveplate, and yieldingly held to its seat by its respective compression spring. I r

2. A compressor valve assembly comprising a valve plate having an annular seriesof groups of exhaust openings, a block mounted upon said plate and provided with a series of vertically transverse spring receiving openings, a spring compression plate secured upon the upper portion of the said block and I provided on its lower face with a plurality of spring centering bosses, valve disks arranged within the/openings in the block, and

respectively cooperating with a group of the series of exhaust openings, and each provided with a plane ground seating lower 7 face, and with a central boss upon itsupper face, coiled compression springswithin said;

openings in said block and confined respectively between one of said bosses on said spring compression plate and a valve disk, and yieldingly maintaining the latter upon its seat. 7

ing a valve plate having a plane upper'face and provided with a concentric series of groups of exhaust openings, ,a spring carrying blocksecured on said plate, the hub 3. A compressor valve assembly compris 1 of said block having an upper central extension, a spring retaining plate carried by said block, and having upon its under face.

a centering recess within which is seated thehub extens10n,and an annular series of recesses in said block, confined between the spring retaining plate and the said valve disks. and centered at their upper endsby' the respective centering bosse 4. A compressor'valve assembly compris ing a valve plate having a plane upper face and provided with a series of exhaust valve openings, a combined valve guide and spring 'spring'centering bosses arranged around theaxis thereof, a series of valve disks, each 00- operating with one of the series groups of retainin block mounted on said late and pression springs within said recesses of said provide with an annular series 0 recesses, spring block and confined between the spring a spring retaining plate on said block, a retaining plate and the said valve disks, and 10 plurality of valve disks arranged respecnormally urging the latter toward their seats 5 tively within and guided by said recesses, on the valve plate. alined springcentering bosses on said plate In testimony whereof I aflix my signature. and valve disks respectively, and coiled oom- EARL B. TEE-BILL. 

